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The Critical Effect of Mixing and Batch Temperature in Thermoset Ceramic Injection Molding

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The Critical Effect of Mixing and Batch Temperature in Thermoset Ceramic Injection Molding THE CRITICAL EFFECT OF MIXING AND BATCH TEMPERATURE IN THERMOSET CERAMIC INJECTION MOLDING BY CORINE E. PETTIT A THESIS SUBMITTED TO THE FACULTY OF ALFRED UNIVERSITY IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN MATERIALS SCIENCE AND ENGINEERING ALFRED, NEW YORK SEPTEMBER 2016 Alfred University theses are copyright protected and may be used for education or personal research only. Reproduction or distribution in part or whole is prohibited without written permission from the author. Signature page may be viewed at Scholes Library, New York State College of Ceramics, Alfred University, Alfred, New York. THE CRITICAL EFFECT OF MIXING AND BATCH TEMPERATURE IN THERMOSET CERAMIC INJECTION MOLDING BY CORINE E. PETTIT B.S. ALFRED UNIVERSITY (2014) SIGNATURE OF AUTHOR APPROVED BY DR. WILLIAM M. CARTY, ADVISOR DR. MATTHEW HALL, ADVISORY COMMITTEE DR. SEONG-JIN LEE, ADVISORY COMMITTEE CHAIR, ORAL THESIS DEFENSE ACCEPTED BY ALASTAIR CORMACK, INTERIM DEAN KAZUO INAMORI SCHOOL OF ENGINEERING ACKNOWLEDGEMENTS First and foremost I would like to thank my advisor, Dr. Bill Carty, for the countless hours of guidance and advice throughout this project. Working with Dr. Carty and having the chance to absorb as much of his knowledge as possible over the past three years (B.S. and M.S. theses) has been an absolutely invaluable opportunity. Secondly, I would like to thank GE Aviation and GE Global Research who funded this project thus allowing me to strive towards my goal of obtaining a Master’s degree in engineering without the added financial stress. Also, thanks to Gerry Wynick and Hyojin Lee for their technical support and help throughout this project. Your efforts are most greatly appreciated. Special thanks goes to the entire office research group (Ben, Alex, Ryan, Matt, and Dan) and Ladonis whose physical help, comic relief, and camaraderie in and out of the lab kept me going. Thanks also to Krishna who has always gone above and beyond not only as a secretary, but especially as a friend. Finally, the biggest of thanks goes to my family: Mom, Dad, Brandi, Davis, Morgan, and Marissa, all whom have provided me with so much more support than I ever could have asked for. Each of you has shown me an incredible amount of unconditional support throughout this entire project and I can never thank you enough. I absolutely could not have done this without each and every one of you. iii TABLE OF CONTENTS Page ACKNOWLEDGEMENTS ...................................................................................................................... III TABLE OF CONTENTS .......................................................................................................................... IV LIST OF TABLES ................................................................................................................................... VII LIST OF FIGURES ................................................................................................................................ VIII ABSTRACT ............................................................................................................................................... XI INTRODUCTION...................................................................................................................................... 1 LITERATURE REVIEW .......................................................................................................................... 4 A. Thermoplastic vs. Thermosetting Polymers ....................................................................... 4 History......................................................................................................................................................... 4 Chemistry ................................................................................................................................................... 4 Thermoplastic Polymers in Injection Molding ............................................................................ 5 Thermosetting Polymers in Injection Molding ........................................................................... 6 B. Basics of Injection Molding ....................................................................................................... 8 History......................................................................................................................................................... 8 Advantages of Injection Molding ...................................................................................................... 9 Disadvantages of Injection Molding ................................................................................................ 9 The Process ............................................................................................................................................... 9 Molding Cycle ........................................................................................................................................ 11 Molding Parameters ........................................................................................................................... 13 EXPERIMENTAL APPROACH ............................................................................................................ 14 TETRAETHYLORTHOSILICATE ....................................................................................................... 15 A. Background .................................................................................................................................. 15 B. Experimental Procedure .......................................................................................................... 17 Regions of Immiscibility .................................................................................................................... 17 Gelation Trials ....................................................................................................................................... 19 Incorporation of Particles................................................................................................................. 20 Evaporation Trials ............................................................................................................................... 20 Increased Binder Level ...................................................................................................................... 20 iv C. Results and Discussion ............................................................................................................. 22 Regions of Immiscibility .................................................................................................................... 22 Gelation Trials ....................................................................................................................................... 24 Incorporation of Particles................................................................................................................. 25 Evaporation Trials ............................................................................................................................... 27 Increased Binder Level ...................................................................................................................... 27 D. Conclusions ................................................................................................................................... 27 POLYMETHYL METHACRYLATE ..................................................................................................... 29 A. Background .................................................................................................................................. 29 B. Experimental Procedure .......................................................................................................... 29 Tailoring Set Time ............................................................................................................................... 29 Selecting Binder Level........................................................................................................................ 30 Injection Molding ................................................................................................................................. 31 C. Results and Discussion ............................................................................................................. 31 Tailoring Set Time ............................................................................................................................... 31 Selecting Binder Level........................................................................................................................ 32 Injection Molding ................................................................................................................................. 32 D. Conclusions ................................................................................................................................... 33 TWO PART EPOXY – PC-7 .................................................................................................................. 34 A. Experimental Procedure .......................................................................................................... 34 Batching ................................................................................................................................................... 34 Determining Rheological Procedure ...........................................................................................
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